JPWO2015004949A1 - Novel lactic acid bacteria and pharmaceuticals, foods and drinks, and feeds containing the novel lactic acid bacteria - Google Patents
Novel lactic acid bacteria and pharmaceuticals, foods and drinks, and feeds containing the novel lactic acid bacteria Download PDFInfo
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- JPWO2015004949A1 JPWO2015004949A1 JP2014540266A JP2014540266A JPWO2015004949A1 JP WO2015004949 A1 JPWO2015004949 A1 JP WO2015004949A1 JP 2014540266 A JP2014540266 A JP 2014540266A JP 2014540266 A JP2014540266 A JP 2014540266A JP WO2015004949 A1 JPWO2015004949 A1 JP WO2015004949A1
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Abstract
高いＩＬ−１２産生促進作用を有するラクトバチルス・パラカゼイＭＣＣ１８４９（ＮＩＴＥ ＢＰ−０１６３３）株を、ＩＬ−１２産生促進用、免疫賦活用、抗ウイルス用等に用いられる医薬、飲食品、又は飼料の成分とする。Lactobacillus paracasei MCC1849 (NITE BP-01633) strain having a high IL-12 production promoting action, a component of a pharmaceutical, food or drink, or feed used for IL-12 production promotion, immunostimulation, antiviral use, etc. And
Description
本発明は、ラクトバチルス・パラカゼイに属する新規乳酸菌、及び、当該乳酸菌を含有する飲食物、医薬品、および飼料に関する。 The present invention relates to a novel lactic acid bacterium belonging to Lactobacillus paracasei, and foods, beverages, pharmaceuticals, and feeds containing the lactic acid bacterium.
一部の乳酸菌は様々な感染症に対する予防作用および防御作用を示すことが報告されている（非特許文献１）。乳酸菌によるこれらの作用は、宿主の細胞性免疫を賦活化することや、腸管や呼吸器などの粘膜からのIgAの分泌を亢進させることなどによることが報告されている（非特許文献１）。例えば、ラクトバチルス・カゼイ（Lactobacillus casei）に属する乳酸菌は、宿主の免疫担当細胞からのIL-12（インターロイキン−１２）やIFN-γ（インターフェロン−γ）などのサイトカイン産生を誘導することで、宿主の細胞性免疫を賦活化し、インフルエンザ・ウイルスなどの感染を防御することが報告されている（非特許文献２〜４）。 Some lactic acid bacteria have been reported to exhibit preventive and protective effects against various infectious diseases (Non-Patent Document 1). These actions by lactic acid bacteria have been reported to activate cellular immunity of the host and enhance secretion of IgA from mucous membranes such as the intestinal tract and respiratory organs (Non-patent Document 1). For example, lactic acid bacteria belonging to Lactobacillus casei induce cytokine production such as IL-12 (interleukin-12) and IFN-γ (interferon-γ) from the host immunocompetent cells, It has been reported that the cellular immunity of a host is activated to prevent infection with influenza virus (Non-patent Documents 2 to 4).
IL-12やIFN-γは、ナイーブ・ヘルパーＴ細胞をタイプ1ヘルパーＴ細胞（Th１）へ分化誘導する作用や、ナチュラルキラー細胞(NK細胞)を活性化する作用、及び、マクロファージなどの細胞の貪食作用を亢進する作用を持つサイトカインであり、ウイルスや細菌による感染防御作用や宿主の抗腫瘍効果に関わっている。従って、乳酸菌による感染症に対する高い予防作用および防御作用を得るためには、強いIL-12産生誘導能を有する乳酸菌を用いることが重要である。そのような乳酸菌として、酸性条件下での生残性が高く、かつ、IL-12産生誘導能に優れたラクトバチルス・パラカゼイ（Lactobadcillus paracasei）FERM BP-11313株が知られている（特許文献１。同文献中、MCC1375株とも記載されている）。 IL-12 and IFN-γ act to induce differentiation of naive helper T cells into type 1 helper T cells (Th1), activate natural killer cells (NK cells), and It is a cytokine that enhances phagocytosis, and is involved in the defense against infection by viruses and bacteria and the antitumor effect of the host. Therefore, in order to obtain a high preventive action and protective action against infections caused by lactic acid bacteria, it is important to use lactic acid bacteria having a strong ability to induce IL-12 production. As such a lactic acid bacterium, Lactobadcillus paracasei FERM BP-11313 is known which has high survival under acidic conditions and is excellent in IL-12 production induction ability (Patent Document 1). In the same document, it is also described as MCC1375 strain).
一方で、乳酸菌によるIL-12誘導には、乳酸菌の細胞壁の関与が示唆されており（特許文献２）、乳酸菌を細胞壁分解酵素（Ｎ−アセチルムラミダーゼ）で処理するとIL-12産生誘導能が損なわれることが報告されている（非特許文献５）。また乳酸菌によるIL-12誘導には、乳酸菌に含まれるRNAも関与することが示唆されており、乳酸菌の加熱死菌体をRNaseで処理した場合、IL-12産生誘導能が著しく損なわれることも報告されている（非特許文献６）。また、これまでに乳酸菌のRNAそのものを利用した免疫賦活剤が提供されている（特許文献３、４）。 On the other hand, it has been suggested that IL-12 induction by lactic acid bacteria involves the cell wall of lactic acid bacteria (Patent Document 2). When lactic acid bacteria are treated with cell wall degrading enzyme (N-acetylmuramidase), IL-12 production inducing ability is exhibited. It is reported to be damaged (Non-Patent Document 5). In addition, it is suggested that RNA contained in lactic acid bacteria is also involved in the induction of IL-12 by lactic acid bacteria. When heat-killed cells of lactic acid bacteria are treated with RNase, the ability to induce IL-12 production is significantly impaired. It has been reported (Non-Patent Document 6). In addition, immunostimulants using lactic acid bacteria RNA themselves have been provided so far (Patent Documents 3 and 4).
ヒトの体内には、細菌に対するＮ−アセチルムラミダーゼ活性を持つリゾチームといった細胞壁分解酵素が存在するため、摂取した乳酸菌はこの影響を受けると考えられる。さらにRNaseは環境中のいたるところに存在し、熱に対して非常に安定であることから、製品中へ容易にコンタミネートし殺菌処理等で失活することもなく残留しうる。またヒトの唾液中や消化液中といった体内にもRNaseは存在するため、乳酸菌を経口摂取後もRNaseの影響を受けることが考えられる。 Since there are cell wall degrading enzymes such as lysozyme having N-acetylmuramidase activity against bacteria in the human body, ingested lactic acid bacteria are considered to be affected by this. Furthermore, RNases are present throughout the environment and are very stable to heat, so they can be easily contaminated into products and remain without being inactivated by sterilization. In addition, RNase is also present in the body of human saliva and digestive fluid, so it may be affected by RNase even after ingesting lactic acid bacteria.
本来高いIL-12誘導能を備えた乳酸菌であっても、唾液や消化液中の細胞壁分解酵素(Ｎ−アセチルムラミダーゼ)や、RNaseの影響を受けることで、生体内で高いIL-12誘導能を十分に維持・発揮できない恐れがある。これら細胞壁分解酵素やRNaseの分泌量は個体差があると考えられ、そのことが個体間の効果の違いにも影響を及ぼしている可能性が大いに考えられる。 Even lactic acid bacteria with high IL-12 inducing ability are naturally affected by cell wall degrading enzymes (N-acetylmuramidase) and RNase in saliva and digestive fluids, leading to high IL-12 induction in vivo There is a risk that it will not be able to fully maintain and demonstrate its performance. These cell wall degrading enzymes and RNase secretion levels are considered to vary from individual to individual, and it is highly possible that this may affect the difference in effects among individuals.
本発明の課題は、種々の感染の予防および防御に有用な乳酸菌、すなわち高いIL-12産生促進作用、又は免疫賦活作用を有し、好ましくはそれらの作用がヒトの体内等で低下しにくい乳酸菌を提供することにある。 An object of the present invention is to provide a lactic acid bacterium useful for prevention and protection of various infections, that is, a lactic acid bacterium having a high IL-12 production promoting action or an immunostimulating action, and preferably their action is not easily reduced in the human body or the like. Is to provide.
上記課題を解決するために、本発明者らは目的とする乳酸菌を鋭意探索し、高いIL-12産生促進作用を有するラクトバチルス・パラカゼイの新規菌株を見出し、本発明を完成させた。 In order to solve the above-mentioned problems, the present inventors diligently searched for a target lactic acid bacterium, found a novel strain of Lactobacillus paracasei having a high IL-12 production promoting action, and completed the present invention.
すなわち本発明は、ラクトバチルス・パラカゼイＭＣＣ１８４９（ＮＩＴＥ ＢＰ−０１６３３）株を提供する。 That is, the present invention provides a Lactobacillus paracasei MCC1849 (NITE BP-01633) strain.
本発明はまた、前記菌株を含む医薬を提供する。
前記医薬は、免疫賦活用であることを好ましい態様としている。
また前記医薬は、抗ウイルス用であることを好ましい態様としている。
前記抗ウイルス用である医薬は、抗インフルエンザ・ウイルス用であることを好ましい態様としている。The present invention also provides a medicament containing the strain.
In a preferred embodiment, the medicine is immunostimulated.
In addition, the medicine is preferably used for antiviral use.
A preferred embodiment is that the medicament for antiviral use is for anti-influenza virus.
本発明はまた、前記菌株を含む飲食品を提供する。
本発明はまた、前記菌株を含む飼料を提供する。The present invention also provides a food or drink containing the strain.
The present invention also provides a feed comprising the strain.
本発明はまた、前記菌株を含むＩＬ−１２産生促進剤を提供する。
前記ＩＬ−１２産生促進剤は、飲食品の形態であることを好ましい態様としている。The present invention also provides an IL-12 production promoter containing the strain.
The IL-12 production promoter is preferably in the form of a food or drink.
以下、本発明を詳細に説明する。
本発明は、ラクトバチルス・パラカゼイに属する乳酸菌の新規菌株である、ラクトバチルス・パラカゼイ（Lactobacillus paracasei）MCC1849（NITE BP-01633）株である。以下、同菌株を「本発明の乳酸菌」、「本発明の菌株」、又は単にMCC1849株と記載することがある。
本発明の乳酸菌は、ヒト糞便を分離源として分離された。同菌株の菌学的性質は、後述の実施例１に示す。同菌株は、2013年6月6日に、独立行政法人製品評価技術基盤機構特許微生物寄託センター（〒292-0818 千葉県木更津市かずさ鎌足２−５−８ １２２号室）に、NITE P-01633の受託番号で寄託され、2014年1月31日にブダペスト条約に基づく国際寄託に移管され、NITE BP-01633の受託番号が付与されている。Hereinafter, the present invention will be described in detail.
The present invention is a Lactobacillus paracasei MCC1849 (NITE BP-01633) strain, which is a novel strain of lactic acid bacteria belonging to Lactobacillus paracasei. Hereinafter, this strain may be referred to as “the lactic acid bacterium of the present invention”, “the strain of the present invention”, or simply the MCC1849 strain.
The lactic acid bacteria of the present invention were isolated using human feces as a separation source. The bacteriological properties of this strain are shown in Example 1 below. On June 6, 2013, the strain was transferred to NITE P-01633 in the Patent Microorganism Depositary Center of the National Institute of Technology and Evaluation (Room 2-5-8 Kazusa, Kazusa, Kisarazu 292-0818, Japan). And was transferred to an international deposit based on the Budapest Treaty on January 31, 2014, and assigned a deposit number of NITE BP-01633.
本発明の乳酸菌は、上記寄託菌株に制限されず、同寄託菌株と実質的に同等の菌株であってもよい。実質的に同等の菌株とは、ラクトバチルス・パラカゼイに属する菌株であって、寄託菌株と同程度の高いIL-12産生促進作用を有し、かつ、好ましくは細胞壁分解酵素、及び、RNaseによる処理によってもIL-12産生促進作用の低下が寄託菌株と同程度に少ない菌株を言う。また、実質的に同等の菌株は、さらに、その16S rRNA遺伝子の塩基配列が、上記寄託菌株の16S rRNA遺伝子の塩基配列と９８％以上、好ましくは９９％以上、より好ましくは１００％の相同性を有し、且つ、好ましくは上記寄託菌株と同一の菌学的性質を有する。さらに、本発明の乳酸菌は、本発明の効果が損なわれない限り、寄託菌株、又はそれと実質的に同等の菌株から、変異処理、遺伝子組換え、自然変異株の選択等によって育種された菌株であってもよい。 The lactic acid bacterium of the present invention is not limited to the deposited strain, and may be a strain substantially equivalent to the deposited strain. Substantially equivalent strains are strains belonging to Lactobacillus paracasei, have the same high IL-12 production promoting effect as the deposited strains, and are preferably treated with cell wall degrading enzymes and RNases Also refers to a strain having a decrease in IL-12 production promoting effect as low as that of the deposited strain. In addition, the substantially equivalent strain further has a homology in which the base sequence of the 16S rRNA gene is 98% or more, preferably 99% or more, more preferably 100%, with the base sequence of the 16S rRNA gene of the deposited strain. And preferably has the same mycological properties as the deposited strain. Further, the lactic acid bacterium of the present invention is a strain bred from the deposited strain or a strain substantially equivalent thereto by mutation treatment, genetic recombination, selection of a natural mutant strain, etc., as long as the effects of the present invention are not impaired. There may be.
MCC1849株は、既知の乳酸菌と比較し、高いIL-12（インターロイキン−１２）産生促進活性を有する。一般に乳酸菌が持つIL-12産生促進活性は、Ｎ−アセチルムラミダーゼのような細胞壁分解酵素、及び、RNase処理によって著しく低下するが、MCC1849株では、細胞壁分解酵素、及び、RNase処理によってもIL-12産生促進活性の低下が少ない。IL-12産生促進活性は、実施例に記載した方法と同様にして測定することができる。 MCC1849 strain has a higher IL-12 (interleukin-12) production promoting activity than known lactic acid bacteria. In general, the IL-12 production promoting activity of lactic acid bacteria is significantly reduced by cell wall degrading enzyme such as N-acetylmuramidase and RNase treatment. However, in MCC1849 strain, IL- 12 Little decrease in production promoting activity. IL-12 production promoting activity can be measured in the same manner as described in the Examples.
MCC1849株は、例えば、同菌株を培養することにより容易に増殖させることができる。培養する方法は、MCC1849株が増殖できる限り特に限定されず、乳酸菌の培養に通常用いられる方法を必要により適宜修正して用いることができる。例えば、培養温度は２５〜５０℃でよく、３５〜４２℃であることが好ましい。また培養は好気条件下、及び嫌気条件下のいずれで行ってもよいが、嫌気条件下で行うことが好ましく、例えば、炭酸ガス等の嫌気ガスを通気しながら培養することができる。また、液体静置培養等の微好気条件下で培養してもよい。 The MCC1849 strain can be easily propagated by, for example, culturing the same strain. The method for culturing is not particularly limited as long as the MCC1849 strain can grow, and the method usually used for culturing lactic acid bacteria can be appropriately modified as necessary. For example, the culture temperature may be 25 to 50 ° C, and preferably 35 to 42 ° C. The culture may be performed under anaerobic conditions or anaerobic conditions, but is preferably performed under anaerobic conditions. For example, the culture can be performed while anaerobic gas such as carbon dioxide gas is aerated. Moreover, you may culture | cultivate on microaerobic conditions, such as liquid stationary culture.
MCC1849株を培養する培地としては、特に限定されず、乳酸菌の培養に通常用いられる培地を必要により適宜修正して用いることができる。すなわち、炭素源としては、例えば、ガラクトース、グルコース、フルクトース、マンノース、セロビオース、マルトース、ラクトース、スクロース、トレハロース、デンプン、デンプン加水分解物、廃糖蜜等の糖類を資化性に応じて使用できる。窒素源としては、例えば、アンモニア、硫酸アンモニウム、塩化アンモニウム、硝酸アンモニウムなどのアンモニウム塩類や硝酸塩類を使用できる。また、無機塩類としては、例えば、塩化ナトリウム、塩化カリウム、リン酸カリウム、硫酸マグネシウム、塩化カルシウム、硝酸カルシウム、塩化マンガン、硫酸第一鉄等を用いることができる。また、ペプトン、大豆粉、脱脂大豆粕、肉エキス、酵母エキス等の有機成分を用いてもよい。また、調製済みの培地としては、例えばＭＲＳ培地を好適に用いることができる。 The medium for culturing the MCC1849 strain is not particularly limited, and a medium usually used for culture of lactic acid bacteria can be appropriately modified as necessary. That is, as the carbon source, for example, saccharides such as galactose, glucose, fructose, mannose, cellobiose, maltose, lactose, sucrose, trehalose, starch, starch hydrolyzate, and molasses can be used according to the utilization. As the nitrogen source, for example, ammonium salts such as ammonia, ammonium sulfate, ammonium chloride, and ammonium nitrate, and nitrates can be used. Examples of inorganic salts that can be used include sodium chloride, potassium chloride, potassium phosphate, magnesium sulfate, calcium chloride, calcium nitrate, manganese chloride, and ferrous sulfate. Organic components such as peptone, soybean powder, defatted soybean meal, meat extract, yeast extract and the like may also be used. Moreover, as the prepared medium, for example, an MRS medium can be preferably used.
MCC1849株としては、培養後、得られた培養物をそのまま用いてもよく、希釈又は濃縮して用いてもよく、培養物から回収した菌体を用いてもよい。また、本発明の効果を損なわない限り、培養後に加熱、及び凍結乾燥等の種々の追加操作を行うことができる。追加の操作は、生菌の生残性が高いものであることが好ましい。尚、本発明の医薬、飲食品、及び飼料においては、MCC1849株の菌体は、生菌であることが好ましいが、死菌であってもよい。 As the MCC1849 strain, after culturing, the obtained culture may be used as it is, diluted or concentrated, or cells recovered from the culture may be used. In addition, various additional operations such as heating and freeze-drying can be performed after culturing as long as the effects of the present invention are not impaired. The additional operation is preferably one in which viability of viable bacteria is high. In the medicament, food and drink, and feed of the present invention, the cells of the MCC1849 strain are preferably live bacteria, but may be dead bacteria.
MCC1849株は、IL-12産生促進剤として利用することができる。MCC1849株、もしくはそれを含むIL-12産生促進剤、又はそれらを含む組成物は、医薬、飲食品、及び飼料として広く用いることができる。たとえば、IL-12産生促進用医薬、IL-12産生促進用飲食品、IL-12産生促進用飼料を提供することができる。
また、本発明のIL-12産生促進剤は、免疫賦活剤、抗ウイルス剤として用いることができる。抗ウイルス剤の対象となるウイルスは、該ウイルスに起因する疾患を、IL-12産生促進又は免疫賦活により予防もしくは治療できるものであれば特に制限されず、例えばインフルエンザウイルスが挙げられる。The MCC1849 strain can be used as an IL-12 production promoter. The MCC1849 strain, or an IL-12 production promoter containing the strain, or a composition containing them can be widely used as a medicine, food and drink, and feed. For example, a medicament for promoting IL-12 production, a food and drink for promoting IL-12 production, and a feed for promoting IL-12 production can be provided.
Further, the IL-12 production promoter of the present invention can be used as an immunostimulatory agent or an antiviral agent. The virus targeted for the antiviral agent is not particularly limited as long as it can prevent or treat a disease caused by the virus by promoting IL-12 production or immunostimulation, and examples thereof include influenza virus.
本発明の医薬は、MCC1849株を含有する限り特に制限されない。本発明の医薬としては、MCC1849株をそのまま使用してもよく、生理的に許容される液体又は固体の製剤担体を配合し製剤化して使用してもよい。 The medicament of the present invention is not particularly limited as long as it contains MCC1849 strain. As the medicament of the present invention, the MCC1849 strain may be used as it is, or may be used by blending a physiologically acceptable liquid or solid pharmaceutical carrier.
本発明の医薬の剤形は特に制限されず、具体的には、錠剤、丸剤、散剤、液剤、懸濁剤、乳剤、顆粒剤、カプセル剤、シロップ剤、坐剤、注射剤、軟膏剤、貼付剤、点眼剤、及び点鼻剤等を例示できる。また、製剤化にあたっては、製剤担体として通常使用される賦形剤、結合剤、崩壊剤、滑沢剤、安定剤、矯味矯臭剤、希釈剤、界面活性剤、又は注射剤用溶剤等の添加剤を使用することができる。 The pharmaceutical dosage form of the present invention is not particularly limited, and specifically, tablets, pills, powders, solutions, suspensions, emulsions, granules, capsules, syrups, suppositories, injections, ointments , Patches, eye drops, nasal drops and the like. In formulation, addition of excipients, binders, disintegrants, lubricants, stabilizers, flavoring agents, diluents, surfactants, or solvents for injections that are commonly used as pharmaceutical carriers Agents can be used.
本発明の医薬におけるMCC1849株の含有量は、剤形、用法、患者の年齢、性別、疾患の種類、疾患の程度、及びその他の条件等により適宜設定されるが、通常、１×１０6〜１×１０12ｃｆｕ／ｇまたは１×１０6〜１×１０12ｃｆｕ／ｍｌの範囲内であることが好ましく、１×１０7〜１×１０11ｃｆｕ／ｇまたは１×１０7〜１×１０11ｃｆｕ／ｍｌの範囲内であることがより好ましい。MCC1849株が死菌の場合、ｃｆｕ／ｇまたはｃｆｕ／ｍｌは、個細胞／ｇまたは個細胞／ｍｌと置き換えることができる。The content of the MCC1849 strain in the medicament of the present invention is appropriately set depending on the dosage form, usage, patient age, sex, type of disease, degree of disease, and other conditions, but usually 1 × 10 6 to Preferably it is in the range of 1 × 10 12 cfu / g or 1 × 10 6 to 1 × 10 12 cfu / ml, 1 × 10 7 to 1 × 10 11 cfu / g or 1 × 10 7 to 1 × 10 More preferably, it is within the range of 11 cfu / ml. When the MCC1849 strain is dead, cfu / g or cfu / ml can be replaced with individual cells / g or individual cells / ml.
また、本発明の効果を損なわない限り、MCC1849株を含有する医薬と、他の医薬、例えばMCC1849株以外のIL-12産生促進剤、免疫賦活剤、抗ウイルス剤、抗炎症剤、抗潰瘍剤等を併用してもよい。 In addition, as long as the effects of the present invention are not impaired, a medicament containing the MCC1849 strain and other medicaments such as IL-12 production promoters other than the MCC1849 strain, immunostimulants, antiviral agents, anti-inflammatory agents, antiulcer agents Etc. may be used in combination.
本発明の医薬の投与時期は特に限定されず、対象となる疾患の治療方法に従って、適宜投与時期を選択することが可能である。また、予防的に投与してもよく、維持療法に用いてもよい。また、投与形態は製剤形態、患者の年齢、性別、その他の条件、患者の症状の程度等に応じて決定されることが好ましい。なお、本発明の医薬は、いずれの場合も１日１回又は複数回に分けて投与することができ、また、数日又は数週間に１回の投与としてもよい。 The administration time of the medicament of the present invention is not particularly limited, and it is possible to appropriately select the administration time according to the treatment method for the target disease. It may be administered prophylactically or used for maintenance therapy. The dosage form is preferably determined according to the dosage form, the patient's age, sex, other conditions, the degree of symptoms of the patient, and the like. In any case, the pharmaceutical of the present invention can be administered once or a plurality of times a day, or can be administered once every several days or weeks.
本発明のIL-12産生促進用剤、又はそれを含む組成物は、MCC1849株の菌体を有効成分として含有するものであり、生体内のIL-12の産生を顕著に促進することができる。増加したIL-12は、細胞性免疫を活性化させる。したがって、本発明のIL-12産生促進剤は細胞性免疫を強化することができ、免疫賦活剤としても使用することができる。「免疫賦活」とは種々の免疫反応を賦活することを意味しており、「免疫活性化」と同義である。また、IL-12産生促進剤は、IL-12産生誘導剤として使用することができる。 The IL-12 production-promoting agent of the present invention, or a composition containing the same, contains MCC1849 strain cells as an active ingredient, and can significantly promote IL-12 production in vivo. . Increased IL-12 activates cellular immunity. Therefore, the IL-12 production promoter of the present invention can enhance cellular immunity and can also be used as an immunostimulator. “Immune activation” means activation of various immune reactions, and is synonymous with “immunity activation”. The IL-12 production promoter can be used as an IL-12 production inducer.
本発明の医薬又はIL-12産生促進剤は、IL-12産生促進作用、又は同作用を介した免疫賦活を有しており、IL-12産生が促進されること、又は免疫が賦活されることによって予防又は治療され得る疾患の予防又は治療に使用することができる。「治療」には、改善も含まれる。
本発明の医薬の適用として具体的には、例えば、アレルギー症状、例えば食物アレルギー、気管支喘息、じんま疹、鼻炎、花粉症、アナフィラキシーショック等の緩和の他、感染症に対する抵抗力の増進、癌の予防、進行の防止等が挙げられる。また、本発明の医薬又はIL-12産生促進剤は、抗腫癌剤、日和見感染症の予防剤又は治療剤、アレルギー疾患予防剤、又は治療剤として広く利用することができる。
本発明の免疫抑制剤は、単独で投与してもよいし、他の医薬、例えば他の免疫抑制剤等と併用してもよい。The medicament or IL-12 production promoter of the present invention has an IL-12 production promoting action or immunostimulation via the same action, and IL-12 production is promoted or immunity is stimulated. It can be used for the prevention or treatment of diseases that can be prevented or treated. “Treatment” also includes improvement.
Specific examples of the application of the medicament of the present invention include, for example, allergy symptoms such as food allergy, bronchial asthma, urticaria, rhinitis, hay fever, anaphylactic shock, etc. Prevention, progression prevention and the like. Moreover, the medicament or IL-12 production promoter of the present invention can be widely used as an antitumor cancer agent, a prophylactic or therapeutic agent for opportunistic infections, an allergic disease preventive agent, or a therapeutic agent.
The immunosuppressive agent of the present invention may be administered alone or in combination with other medicaments such as other immunosuppressive agents.
本発明の他の形態は、IL-12産生促進剤、又は免疫賦活剤の製造における、MCC1849株の使用である。また、本発明の他の形態は、MCC1849株、又は本発明の医薬を適用対象に投与する工程を含む、IL-12産生促進によって予防又は治療され得る疾患の予防又は治療方法である。 Another aspect of the present invention is the use of MCC1849 strain in the production of an IL-12 production promoter or immunostimulator. Moreover, the other form of this invention is the prevention or treatment method of the disease which can be prevented or treated by IL-12 production promotion including the process of administering MCC1849 strain or the pharmaceutical of this invention to an application object.
また本発明の医薬は、他の態様として、抗ウイルス剤として使用することができ、特に抗インフルエンザ・ウイルス剤として使用することができる。本発明の抗インフルエンザ・ウイルス剤は、インフルエンザ・ウイルスに起因する疾患の予防又は治療に用いることができる。本発明の抗インフルエンザ・ウイルス剤は、インフルエンザ・ウイルスの感染又は生体内での増殖を低減することができる。尚、抗ウイルス剤の対象となるウイルスは、該ウイルスに起因する疾患を、IL-12産生促進又は免疫賦活により予防もしくは治療できるものであれば特に制限されない。 Moreover, the pharmaceutical of this invention can be used as an antiviral agent as another aspect, and can be used especially as an anti-influenza virus agent. The anti-influenza virus agent of the present invention can be used for prevention or treatment of diseases caused by influenza virus. The anti-influenza virus agent of the present invention can reduce influenza virus infection or in vivo growth. In addition, the virus used as the object of an antiviral agent will not be restrict | limited especially if the disease resulting from this virus can prevent or treat by IL-12 production promotion or immunostimulation.
本発明の他の形態は、抗ウイルス剤、例えば抗インフルエンザ・ウイルス剤の製造における、MCC1849株の使用である。また、本発明の他の形態は、MCC1849株、又は本発明の医薬を適用対象に投与する工程を含む、ウイルスに起因する疾患、例えばインフルエンザの予防又は治療方法である。 Another aspect of the invention is the use of strain MCC1849 in the manufacture of antiviral agents, such as anti-influenza virus agents. Another embodiment of the present invention is a method for preventing or treating a disease caused by a virus, for example, influenza, comprising a step of administering the MCC1849 strain or the medicament of the present invention to an application subject.
本発明の飲食品は、MCC1849株を含有する限り特に制限されず、飲食品としては、清涼飲料、炭酸飲料、栄養飲料、果汁飲料、及び乳酸菌飲料等の飲料（これらの飲料の濃縮原液及び調製用粉末を含む）；アイスクリーム、シャーベット、かき氷等の氷菓；飴、チューインガム、キャンディー、ガム、チョコレート、錠菓、スナック菓子、ビスケット、ゼリー、ジャム、クリーム、及び焼き菓子等の菓子類；加工乳、乳飲料、発酵乳、ドリンクヨーグルト、及びバター等の乳製品；パン；経腸栄養食、流動食、育児用ミルク、スポーツ飲料；その他機能性食品等が例示される。また、飲食品は、サプリメントであってもよく、例えばタブレット状のサプリメントであってもよい。サプリメントである場合には、一日当りの食事量及び摂取カロリーについて他の食品に影響されることなく、MCC1849株を摂取できる。 The food or drink of the present invention is not particularly limited as long as it contains MCC1849 strain. Ice cream, sherbet, shaved ice, etc .; confectionery such as candy, chewing gum, candy, gum, chocolate, tablet confectionery, snack confectionery, biscuits, jelly, jam, cream, and baked confectionery; processed milk, Examples include dairy products such as milk drinks, fermented milk, drink yogurt, and butter; breads; enteral nutritional foods, liquid foods, milk for childcare, sports drinks; and other functional foods. The food and drink may be a supplement, for example, a tablet-like supplement. In the case of a supplement, the MCC1849 strain can be ingested without being influenced by other foods in terms of the daily meal amount and calorie intake.
本発明の飲食品は、飲食品の原料にMCC1849株を添加することにより製造することができ、MCC1849株を添加すること以外は、通常の飲食品と同様にして製造することができる。MCC1849株の添加は、飲食品の製造工程のいずれの段階で行ってもよい。また、添加したMCC1849株による発酵工程を経て、飲食品が製造されてもよい。そのような飲食品としては、乳酸菌飲料、及び発酵乳等が挙げられる。
食品又は飲料の原料としては、通常の飲料や食品に用いられている原料を使用することができる。製造された飲食品は、経口的に摂取することが可能である。The food / beverage products of this invention can be manufactured by adding MCC1849 stock to the raw material of food / beverage products, and can be manufactured similarly to normal food / beverage products except adding MCC1849 stock. The addition of MCC1849 strain may be performed at any stage of the production process of food and drink. Moreover, food-drinks may be manufactured through the fermentation process by the added MCC1849 strain. Examples of such foods and drinks include lactic acid bacteria beverages and fermented milk.
As a raw material for food or beverage, a raw material used for a normal beverage or food can be used. The manufactured food and drink can be taken orally.
本発明の飲食品には、飲食品製造のための原料、及び食品添加物等、飲食品の製造工程又は製造後に飲食品に添加されるものも含まれる。例えば、本発明の乳酸菌は、発酵乳製造用スターターとして使用することができる。また、本発明の乳酸菌を、製造された発酵乳に後から添加することもできる。 The food / beverage products of the present invention include those that are added to the food / beverage products after the production process of the food / beverage products, such as raw materials for food / beverage product production and food additives. For example, the lactic acid bacteria of the present invention can be used as a starter for producing fermented milk. Moreover, the lactic acid bacteria of this invention can also be added later to the manufactured fermented milk.
本発明の飲食品におけるMCC1849株の含有量は、飲食品の態様によって適宜設定されるが、通常、飲食品中に、１×１０6〜１×１０12ｃｆｕ／ｇまたは１×１０6〜１×１０12ｃｆｕ／ｍｌの範囲内であることが好ましく、１×１０7〜１×１０11ｃｆｕ／ｇまたは１×１０7〜１×１０11ｃｆｕ／ｍｌの範囲内であることがより好ましい。The content of the MCC1849 strain in the food and drink of the present invention is appropriately set depending on the form of the food and drink, but is usually 1 × 10 6 to 1 × 10 12 cfu / g or 1 × 10 6 to 1 in the food and drink. It is preferably in the range of × 10 12 cfu / ml, more preferably in the range of 1 × 10 7 to 1 × 10 11 cfu / g or 1 × 10 7 to 1 × 10 11 cfu / ml.
本発明の飲食品は、IL-12産生促進、免疫賦活、抗ウイルス等の効果を利用する種々の用途に用いることができる。すなわち、本発明の乳酸菌を含有し、かつ、飲食品の形態である、IL-12産生促進剤、免疫賦活剤、及び、抗ウイルス剤を提供することができる。飲食品の形態であるIL-12産生促進剤、免疫賦活剤、及び抗ウイルス剤は、各々、本発明の飲食品を含むIL-12産生促進剤、本発明の飲食品を含む免疫賦活剤、及び本発明の飲食品を含む抗ウイルス剤と同義である。 The food / beverage products of this invention can be used for the various uses using effects, such as IL-12 production promotion, immunostimulation, and antiviral. That is, it is possible to provide an IL-12 production promoter, an immunostimulant, and an antiviral agent that contain the lactic acid bacteria of the present invention and are in the form of food and drink. IL-12 production promoter, immunostimulant, and antiviral agent in the form of food and drink, respectively, IL-12 production promoter containing the food and drink of the present invention, immunostimulator containing the food and drink of the present invention, And it is synonymous with the antiviral agent containing the food-drinks of this invention.
本発明の飲食品は、IL-12産生促進用、免疫賦活用、抗ウイルス用との用途が表示された飲食品として販売することができる。また、本発明の飲食品には、「IL-12産生促進用」、「免疫賦活用」、「免疫活性化用」、「抗ウイルス用」、「抗インフルエンザ・ウイルス用」、「感染症予防用」等の表示をすることができる。また、これ以外でも、IL-12産生促進によって二次的に生じる効果を表す文言であれば、使用できることはいうまでもない。 The food / beverage products of the present invention can be sold as food / beverage products displaying uses for promoting IL-12 production, immunostimulation, and antiviral use. In addition, the food and drink of the present invention include “for IL-12 production promotion”, “immunization”, “for immune activation”, “for antiviral”, “for anti-influenza virus”, “infectious disease prevention” Display "can be displayed. In addition, it is needless to say that any language other than the above can be used as long as it expresses an effect that is secondarily generated by promoting IL-12 production.
前記「表示」とは、需要者に対して上記用途を知らしめるための全ての行為を意味し、上記用途を想起・類推させうるような表示であれば、表示の目的、表示の内容、表示する対象物及び媒体等の如何に拘わらず、すべて本発明の「表示」に該当する。しかしながら、需要者が上記用途を直接的に認識できるような表現により表示することが好ましい。
具体的には、本発明の飲食品に係る商品又は商品の包装に上記用途を記載する行為、商品又は商品の包装に上記用途を記載したものを譲渡し、引渡し、譲渡若しくは引渡しのために展示し、輸入する行為、商品に関する広告、価格表若しくは取引書類に上記用途を記載して展示し、若しくは頒布し、又はこれらを内容とする情報に上記用途を記載して電磁気的（インターネット等）方法により提供する行為等が例示でき、特に包装、容器、カタログ、パンフレット、ＰＯＰ等の販売現場における宣伝材、その他の書類等への表示が好ましい。The “display” means all acts for informing the consumer of the use, and if it is a display that can recall and analogize the use, the purpose of the display, the content of the display, the display Regardless of the object and medium to be processed, all fall under the “display” of the present invention. However, it is preferable to display in such an expression that the consumer can directly recognize the application.
Specifically, the act of describing the above-mentioned use in the product or product packaging relating to the food or drink of the present invention, the product or product packaging describing the above-mentioned use is transferred, and displayed for delivery, transfer or delivery And importing, displaying advertisements on products, price lists or transaction documents for display or distribution, or describing the above uses in information containing these, electromagnetic (Internet, etc.) methods In particular, it is preferable to display on advertising materials at sales sites such as packaging, containers, catalogs, pamphlets, POPs, and other documents.
また、表示としては、行政等によって許可された表示（例えば、行政が定める各種制度に基づいて認可を受け、そのような認可に基づいた態様で行う表示）であることが好ましい。例えば、健康食品、機能性食品、経腸栄養食品、特別用途食品、栄養機能食品、医薬用部外品等としての表示を例示することができ、その他厚生労働省によって認可される表示、例えば、特定保健用食品、これに類似する制度にて認可される表示を例示できる。後者の例としては、特定保健用食品としての表示、条件付き特定保健用食品としての表示、身体の構造や機能に影響を与える旨の表示、疾病リスク低減表示等を例示することができる。さらに詳細には、健康増進法施行規則（平成１５年４月３０日日本国厚生労働省令第８６号）に定められた特定保健用食品としての表示（特に保健の用途の表示）、及びこれに類する表示等を例示することができる。 In addition, the display is preferably a display permitted by the government or the like (for example, a display which is approved based on various systems determined by the government and is performed in a mode based on such approval). For example, indications such as health foods, functional foods, enteral nutrition foods, special purpose foods, functional nutrition foods, quasi-drugs, and other indications approved by the Ministry of Health, Labor and Welfare, such as specific Examples of health foods and labels approved by similar systems. Examples of the latter include a display as a food for specified health use, a display as a food for specified specific health use, a display that affects the structure and function of the body, a display for reducing disease risk, and the like. In more detail, the indication as food for specified health (especially the indication of the use of health) stipulated in the Enforcement Regulation of the Health Promotion Act (Ministry of Health, Labor and Welfare Ordinance No. 86 of April 30, 2003), and Similar displays can be exemplified.
本発明の飼料としては、ペットフード、家畜飼料、及び養魚飼料等が例示される。本発明の飼料は、一般的な飼料、例えば、穀類、粕類、糠類、魚粉、骨粉、油脂類、脱脂粉乳、ホエー、鉱物質飼料、又は酵母類等にMCC1849株を混合することにより製造することができる。また、例えばサイレージの様に、添加したMCC1849株による発酵工程を経て、飼料が製造されてもよい。製造された飼料は、一般的な哺乳動物、家畜類、養魚類、及び愛玩動物等に経口的に投与することが可能である。 Examples of the feed of the present invention include pet food, livestock feed, and fish feed. The feed of the present invention is produced by mixing the MCC1849 strain with a general feed such as cereals, potatoes, potatoes, fish meal, bone meal, fats and oils, skim milk powder, whey, mineral feed, or yeasts. can do. Moreover, a feed may be manufactured through the fermentation process by the added MCC1849 strain like silage, for example. The produced feed can be orally administered to general mammals, livestock, fish farms, pets and the like.
本発明の飼料におけるMCC1849株の含有量は、飼料の態様や投与対象によって適宜設定されるが、１×１０6〜１×１０12ｃｆｕ／ｇまたは１×１０6〜１×１０12ｃｆｕ／ｍｌの範囲内であることが好ましく、１×１０7〜１×１０11ｃｆｕ／ｇまたは１×１０7〜１×１０11ｃｆｕ／ｍｌの範囲内であることがより好ましい。The content of the MCC1849 strain in the feed of the present invention is appropriately set depending on the form of the feed and the administration target, but it is 1 × 10 6 to 1 × 10 12 cfu / g or 1 × 10 6 to 1 × 10 12 cfu / ml. Preferably, it is in the range of 1 × 10 7 to 1 × 10 11 cfu / g or 1 × 10 7 to 1 × 10 11 cfu / ml.
以下に、実施例を用いて本発明をさらに具体的に説明するが、本発明はこれら実施例に限定されるものではない。 Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.
〔実施例１〕MCC1849株の菌学的性質
MCC1849株は、ヒト糞便サンプルから分離した。同株の菌学的性質として、細胞の形態、運動性、胞子形成、グラム染色性、カタラーゼ、グルコースからのガスの産生、及び、糖の発酵性を表１に示す。糖の発酵性は、細菌同定キットAPI 50CH（シスメックス・ビオメリュー社）を用いて調べた。キットに付属のマニュアル記載の方法にしたがって一晩培養後の菌液を各基質を含む培地に接種し、これを３７℃のインキュベーターで培養し、培養１日目および２日目に各基質の糖発酵性状を評価した。
これらの菌学的性質を表１に示す。この結果から、MCC1849株はラクトバチルス・パラカゼイと判定された。[Example 1] Mycological properties of MCC1849 strain
MCC1849 strain was isolated from a human stool sample. Table 1 shows the cell morphology, motility, spore formation, Gram staining, catalase, gas production from glucose, and sugar fermentability as mycological properties of the strain. The fermentability of sugar was examined using a bacterial identification kit API 50CH (Sysmex Biomelieu). The bacterial solution after overnight culture is inoculated into a medium containing each substrate according to the method described in the manual attached to the kit, and cultured in a 37 ° C. incubator. Fermentation properties were evaluated.
These mycological properties are shown in Table 1. From this result, MCC1849 strain was determined to be Lactobacillus paracasei.
また、MCC1849株の16S rRNA遺伝子塩基配列の解析からは、MCC1849株はラクトバチルス・パラカゼイまたはラクトバチルス・カゼイであると判断された。ラクトバチルス・パラカゼイとラクトバチルス・カゼイは近縁種であり、標準株間の16S rRNA遺伝子塩基配列の相同性は９９％以上であることが示されている（Huang CH, and Lee FL., Antonie Van Leeuwenhoek, 2011, 99(2):319-27）。MCC1849株のゲノム配列を決定し、リードをラクトバチルス・パラカゼイ標準株(ATCC25302)またはラクトバチルス・カゼイ標準株(ATCC393)をリファレンスゲノムとしてマッピングすることで相同性を確認した。 From the analysis of the 16S rRNA gene base sequence of the MCC1849 strain, it was determined that the MCC1849 strain was Lactobacillus paracasei or Lactobacillus casei. Lactobacillus paracasei and Lactobacillus casei are closely related species, and it has been shown that the homology of the 16S rRNA gene base sequence between the standard strains is 99% or more (Huang CH, and Lee FL., Antonie Van Leeuwenhoek, 2011, 99 (2): 319-27). The genome sequence of the MCC1849 strain was determined, and the homology was confirmed by mapping the lead as a reference genome of the Lactobacillus paracasei standard strain (ATCC25302) or the Lactobacillus casei standard strain (ATCC393).
その結果、MCC1849株はラクトバチルス・パラカゼイ標準株との相同性が８５％であったのに対し、ラクトバチルス・カゼイ標準株との相同性は４５％であった。
したがって、MCC1849株はラクトバチルス・パラカゼイであることが確認された。As a result, the MCC1849 strain had 85% homology with the Lactobacillus paracasei standard strain, whereas the homology with the Lactobacillus casei standard strain was 45%.
Therefore, MCC1849 strain was confirmed to be Lactobacillus paracasei.
〔実施例２〕マウス脾細胞を用いたIL-12産生誘導能の評価
実施例１に記載のラクトバチルス・パラカゼイMCC1849株、及び、高いIL-12産生誘導能を持つことが知られているラクトバチルス・パラカゼイFERM BP-11313株（国際公開２０１２／１３３８２７）、並びに他の乳酸菌の菌株であるラクトバチルス・ラムノーサス（Lactobacillus rhamnosus）ATCC53103株、ラクトバチルス・ジョンソニ（Lactobacillus johnsonii）JCM2012株、ラクトバチルス・プランタルム（Lactobacillus plantarum）JCM1149株、ラクトバチルス・ブルガリカス（Lactobacillus bulgaricus）ATCC11842株を対象に、RNase処理または細胞壁分解酵素処理の有無が乳酸菌のIL-12産生誘導能に及ぼす影響を、マウス脾細胞を用いて評価した。[Example 2] Evaluation of IL-12 production inducing ability using mouse spleen cells Lactobacillus paracasei MCC1849 strain described in Example 1 and a lactose known to have high IL-12 production inducing ability Bacillus paracasei FERM BP-11313 (International Publication 2012/133828), and other lactic acid bacteria strains Lactobacillus rhamnosus ATCC53103, Lactobacillus johnsonii JCM2012, Lactobacillus plantarum (Lactobacillus plantarum) JCM1149 strain, Lactobacillus bulgaricus ATCC11842 strain, the effect of the presence or absence of RNase treatment or cell wall degrading enzyme treatment on the ability to induce IL-12 production of lactic acid bacteria using mouse splenocytes And evaluated.
FERM BP-11313株は、独立行政法人製品評価技術基盤機構特許微生物寄託センターに国際寄託されている。JCM2012株、及びJCM1149株は、独立行政法人理化学研究所微生物系統保存施設（JCM）（〒351-0198 埼玉県和光市広沢2-1）から入手することができる。また、ATCC53103株、及びATCC11842株は、アメリカン・タイプ・カルチャー・コレクション（住所 12301 Parklawn Drive, Rockville, Maryland 20852, United States of America）から入手することができる。 FERM BP-11313 strain is deposited internationally at the Patent Microorganism Depositary Center for Product Evaluation Technology. JCM2012 strain and JCM1149 strain can be obtained from RIKEN Microbial System Preservation Facility (JCM) (2-1 Hirosawa, Wako, Saitama 351-0198). The ATCC 53103 and ATCC 11842 strains can be obtained from the American Type Culture Collection (address 12301 Parklawn Drive, Rockville, Maryland 20852, United States of America).
上記乳酸菌の各菌株をＭＲＳ（de Man Rogasa Sharpe）培地（BD社製）で１６時間培養し、菌体を遠心分離及び蒸留水への再懸濁により３回洗浄した後に、蒸留水で１０ｍｇ（菌体乾燥重量換算）／ｍｌになるよう懸濁し、１００℃、１５分の加熱処理を行い、乳酸菌死菌体液（「酵素未処理」）とした。 Each strain of lactic acid bacteria was cultured in MRS (de Man Rogasa Sharpe) medium (BD) for 16 hours, and the cells were washed three times by centrifugation and resuspension in distilled water, and then 10 mg ( Suspended to a dry cell weight) / ml and heat-treated at 100 ° C. for 15 minutes to obtain a lactic acid bacterium cell suspension (“enzyme untreated”).
各乳酸菌死菌体液を遠心分離し、上清を取り除き、沈殿物を４ｍＭ塩化マグネシウムを含む５０ｍＭトリス−リンゴ酸緩衝液（ｐＨ７．０）で１０ｍｇ（菌体乾燥重量換算）／ｍｌになるよう懸濁し、Ｎ−アセチルムラミダーゼ（N-acetylmuramidase SG。生化学工業株式会社）を５μｇ／ｍｌ添加して、３７℃で１２０分間反応を行った後、１００℃、５分の加熱処理により酵素を失活させ、細胞壁分解酵素処理物（「Ｎ−アセチルムラミダーゼ処理」）とした。 Centrifugation of each lactic acid bacterium dead liquid, the supernatant is removed, and the precipitate is suspended with 50 mM Tris-malic acid buffer (pH 7.0) containing 4 mM magnesium chloride so that the concentration becomes 10 mg (in terms of dry cell weight) / ml. After turbidity, 5 μg / ml of N-acetylmuramidase SG (Seikagaku Corporation) was added and reacted at 37 ° C. for 120 minutes, and then the enzyme was lost by heat treatment at 100 ° C. for 5 minutes. The resulting product was treated with cell wall degrading enzyme ("N-acetylmuramidase treatment").
他方、各乳酸菌死菌体液に、リボヌクレアーゼＡ（RNase A、Life Technologies社製）を０．１ｍｇ／ｍｌ添加し、３７℃、３０分間処理した。処理後、遠心分離及び蒸留水への再懸濁により沈殿物を３回洗浄した後に、１０ｍｇ（菌体乾燥重量換算）／ｍｌとなるように蒸留水で再度懸濁し、RNase処理物（「RNase処理」）とした。 On the other hand, 0.1 mg / ml of ribonuclease A (RNase A, manufactured by Life Technologies) was added to each lactic acid bacterium killed body fluid and treated at 37 ° C. for 30 minutes. After the treatment, the precipitate was washed three times by centrifugation and resuspension in distilled water, and then suspended again in distilled water to a concentration of 10 mg (in terms of dry cell weight) / ml and treated with RNase (“RNase Treatment ").
実験動物には７週齢のオスBALB/cマウス（日本SLC）を用い、７〜９週齢時に解剖し脾臓を採取した。採取した脾臓より脾細胞を採取し、赤血球溶血液（０．１４４Ｍ塩化アンモニウム、１７ｍＭトリスヒドロキシメチルアミノメタン、ｐＨ７．６５）にて２分間処理して遠心分離することにより、赤血球画分を除去した脾細胞を調製した。この脾細胞と、先に調製した乳酸菌死菌体液（酵素未処理）、細胞壁分解酵素処理物（Ｎ−アセチルムラミダーゼ処理）、又はRNase処理物（RNase処理）とに、RPMI1640（SIGMA-ALDRICH社製）に１０％ＦＢＳ（Fetal Bovine Serum、Life Technologies社製）、１００ ＩＵ／ｍｌペニシリン、０．１ｍｇ／ｍｌストレプトマイシンを加えた培地を添加して、脾細胞数が２．５×１０6個細胞／ｍｌ、かつ、乳酸菌死菌体液、細胞壁分解酵素処理物、又はRNase処理物が各々終濃度５μｇ（菌体乾燥重量換算）／ｍｌとなるように調製した試験液２００μｌを、９６穴のマイクロプレート（BD社製）にアプライして３７℃、５％ＣＯ2存在下で培養した。
２日後に培養上清を回収し、培養上清中のIL-12 p70（p40-p35ヘテロダイマー）の濃度を、測定キット（Mouse IL-12 p70 DuoSet。R&D Systems社製）を用いて測定した。As experimental animals, 7-week-old male BALB / c mice (Japan SLC) were used, dissected at 7-9 weeks of age, and spleens were collected. Spleen cells were collected from the collected spleen and treated with erythrocyte lysate (0.144 M ammonium chloride, 17 mM trishydroxymethylaminomethane, pH 7.65) for 2 minutes and centrifuged to remove the erythrocyte fraction. Spleen cells were prepared. RPMI1640 (SIGMA-ALDRICH Co., Ltd.) was added to the spleen cells and the previously prepared lactic acid bacteria killed body fluid (enzyme untreated), cell wall degrading enzyme treated product (N-acetylmuramidase treated), or RNase treated product (RNase treated). Medium) supplemented with 10% FBS (Fetal Bovine Serum, Life Technologies), 100 IU / ml penicillin, 0.1 mg / ml streptomycin, and the number of splenocytes is 2.5 × 10 6 cells A 96-well microplate was prepared by adding 200 μl of a test solution prepared to a final concentration of 5 μg / ml of lactic acid bacteria killed cell fluid, cell wall degrading enzyme-treated product, or RNase-treated product / ml. (BD) and cultured at 37 ° C. in the presence of 5% CO 2 .
Two days later, the culture supernatant was collected, and the concentration of IL-12 p70 (p40-p35 heterodimer) in the culture supernatant was measured using a measurement kit (Mouse IL-12 p70 DuoSet, manufactured by R & D Systems). .
試験は３回行い、その結果を表２及び図１に示す。 The test was performed three times, and the results are shown in Table 2 and FIG.
ラクトバチルス・パラカゼイMCC1849株は、高いIL-12産生誘導能を持つことが知られているFERM BP-11313株と比較して、それ以上のIL-12産生誘導能を示した。また他の乳酸菌株は、これらの菌株よりもIL-12産生誘導能は低かった。 The Lactobacillus paracasei MCC1849 strain showed a greater ability to induce IL-12 production than the FERM BP-11313 strain, which is known to have a high ability to induce IL-12 production. In addition, other lactic acid strains had lower IL-12 production inducing ability than these strains.
Ｎ−アセチルムラミダーゼ処理、又はRNase処理により、MCC1849株以外の乳酸菌株では、IL-12産生誘導能は著しく低下したが、MCC1849株では、それらの処理を受けても高いIL-12産生誘導能を維持した。MCC1849と同じ菌種であるFERM BP-11313株でも、Ｎ−アセチルムラミダーゼ処理、又はRNase処理によってIL-12産生誘導活性が損なわれていることから、MCC1849株が持つIL-12産生誘導能の安定性は、菌種依存的な性質ではなく、菌株に依存する性質であることが示された。 IL-12 production-inducing ability was significantly reduced in lactic acid strains other than MCC1849 strain by N-acetylmuramidase treatment or RNase treatment. However, in MCC1849 strain, IL-12 production-inducing ability was high even after these treatments. Maintained. Even in FERM BP-11313 strain, which is the same strain as MCC1849, the IL-12 production inducing activity is impaired by N-acetylmuramidase treatment or RNase treatment. It was shown that the stability is not a strain-dependent property but a strain-dependent property.
〔実施例３〕MCC1849株によるインフルエンザ・ウイルス感染予防作用
MCC1849株投与によるインフルエンザ・ウイルス感染予防作用を、マウスを用いて調べた。
MCC1849株をＭＲＳ培地で１６時間培養し、菌体を蒸留水で２回洗浄した後に蒸留水に懸濁し、蔗糖およびグルタミン酸ソーダを添加し、凍結乾燥を行った。凍結乾燥した菌体を生理食塩水で１×１０10 ｃｆｕ／ｍｌに懸濁したものをMCC1849株生菌液とした。[Example 3] Prevention of influenza virus infection by MCC1849 strain
The effect of MCC1849 strain administration to prevent influenza virus infection was examined using mice.
The MCC1849 strain was cultured in MRS medium for 16 hours, and the cells were washed twice with distilled water, suspended in distilled water, sucrose and sodium glutamate were added, and lyophilization was performed. A suspension of lyophilized cells in physiological saline at 1 × 10 10 cfu / ml was used as the MCC1849 strain viable cell solution.
MCC1849株をＭＲＳ培地で１６時間培養した物を、ＰＢＳで２回洗浄し、さらに蒸留水で１回洗浄した後に蒸留水で懸濁し、１００℃、３０分間の加熱処理を行った。加熱処理後、菌体を蒸留水で２回洗浄した後に蒸留水で懸濁し、凍結乾燥を行った。凍結乾燥した菌体を生理食塩水で５ｍｇ／ｍｌに懸濁したものをMCC1849株死菌液とした。 A product obtained by culturing the MCC1849 strain in MRS medium for 16 hours was washed twice with PBS, further washed once with distilled water, suspended in distilled water, and heat-treated at 100 ° C. for 30 minutes. After the heat treatment, the cells were washed twice with distilled water, suspended in distilled water, and lyophilized. A suspension of freeze-dried cells at 5 mg / ml in physiological saline was used as the MCC1849 strain killed solution.
BALB/cマウスに、０．２ｍｌのMCC1849株の生菌液（Live群）、死菌液（HK群）または生理食塩水（Control群）を１４日間経口投与した後、インフルエンザ・ウイルス（A/PR8/34(H1N1)株）を鼻腔より感染させた。感染６日後に、マウスの眼（開瞼と眼瞼の程度）、被毛（毛並み と立毛）、呼吸（呼吸不整）、行動（自発運動の程度）に関する一般状態を観察し、各項目を下記基準によりスコア化することで、発症状況を評価した。 BALB / c mice were orally administered 0.2 ml of MCC1849 strain live bacteria solution (Live group), killed bacteria solution (HK group) or physiological saline (Control group) for 14 days, then influenza virus (A / PR8 / 34 (H1N1) strain) was infected from the nasal cavity. 6 days after infection, general conditions regarding mouse eyes (open eyelids and eyelids), coat (hairiness and nap), respiration (respiratory irregularities), behavior (degree of spontaneous movement) were observed. The onset situation was evaluated by scoring.
正常 ：０
軽度の感染 ：１
中程度の感染：２
重度の感染 ：３
死亡 ：４
各項目のスコアの平均値を、マウスの個体ごとの症状スコア（Symptom score）とした。Normal: 0
Mild infection: 1
Moderate infection: 2
Severe infection: 3
Death: 4
The average score of each item was used as the symptom score for each mouse.
また、感染６日後に肺を摘出し、肺中ウイルス濃度を、MDCK細胞（イヌ由来腎臓細胞）を用いたプラークアッセイ法より測定した。 Further, 6 days after the infection, the lung was removed, and the virus concentration in the lung was measured by a plaque assay method using MDCK cells (canine-derived kidney cells).
試験結果を表３及び図２に示す。MCC1849株非投与（Control群）に比べて、MCC1849株生菌液（Live群）、MCC1849株死菌液（HK群）のいずれの投与によっても、症状スコアが有意に低減され、肺中ウイルス濃度（Virus titer）も有意に減少した。これらの結果から、MCC1849株は、生菌、死菌いずれの状態による投与でも、インフルエンザ・ウイルス感染の予防に有効であることが示された。 The test results are shown in Table 3 and FIG. Compared to the non-administration of the MCC1849 strain (Control group), the symptom score was significantly reduced by administration of either the MCC1849 strain live bacterial solution (Live group) or the MCC1849 strain killed bacterial solution (HK group). (Virus titer) also decreased significantly. From these results, it was shown that the MCC1849 strain is effective in preventing influenza virus infection even when administered in both live and dead states.
本発明の菌株であるラクトバチルス・パラカゼイMCC1849株は、高いIL-12産生促進活性を有する。同菌株の持つIL-12産生促進活性は、細胞壁分解酵素、及び、RNaseによる処理によっても低下が少ない。したがって、同菌株の持つIL-12産生促進活性は、適用対象の個体差が少ないと考えられ、免疫賦活剤として有用である。また、同菌株は、インフルエンザ・ウイルス等の感染又は増殖を低減することができ、感染症の予防、治療等に利用することができる。 The Lactobacillus paracasei MCC1849 strain, which is the strain of the present invention, has a high IL-12 production promoting activity. The IL-12 production-promoting activity of the same strain is little reduced by treatment with cell wall degrading enzymes and RNases. Therefore, the IL-12 production promoting activity possessed by the same strain is considered to have little difference between individuals to be applied, and is useful as an immunostimulator. In addition, the strain can reduce infection or proliferation of influenza virus, etc., and can be used for prevention and treatment of infectious diseases.
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